Liberty 31 Back Extension

Liberty 31 Back Extension

The Liberty Strength Back Extension focuses on the muscles of the lower back that help to extend the spine and aid in rotational movements. The Back Extension movement complements the muscles trained during abdominal exercises.
 
Standard Frame Colors
Upholstery Options
Instructional Placard Easy to understand exercise placards feature large set-up and start and finish position diagrams that are visibly easy to identify. 
Weight Stack Each selector plate is entirely precision-machined on all surfaces. The top plate has replaceable precision self-lubricating bushings.
The plates feature a black painted protective finish. Guide rods are precision centerless ground, polished, with corrosion-resistant plating for smooth operation and rust retardation.
The weight stack is elevated to facilitate user pin selection from a seated position.
Upholstery Premium-quality  urethane molded-foam padding for maximum comfort. Automotive-grade, two-textured fabric features double top stitching on all seams.
Adjustments Handles include slip-resistant rubber sleeves with machined alloy end-caps. Adjustment points are highlighted with a contrasting color for ease-of-use
Water Bottle and Accessories Holder The drink-and-accessory holder features large open, even surfaced area, easily accessible and easy to keep clean.
Frame and Finish The frame is 11 gauge (.120 in) 2x4" electro weld steel racetrack tubing. Movement arms are made of electro weld steel round tubing. The five-stage material prep/wash process is followed by an electrostatically applied, heat-cured powder coat.
Bearings and Pivot Points Oversized, linear, re-circulating ball bearings run on case-hardened shafts and are sealed and self aligning. Pivot points and joints feature motor-grade sealed ball bearings, or sleeve bearings, utilizing either oil-impregnated bronze bushings or pre-lubricated nylon bushings. Bolts are grade 5 or above in all applications.
Pulleys and Cables Glass-fiber-reinforced nylon pulleys provide strength and durability, while precision ball bearings allow effortless rotation. Cables use a 7x19 stranded wire configuration for added strength and flexibility and are coated with black pressure-extruded nylon for long lasting protection and a smooth feel. 3/16-inch (.48 cm) wire is coated to 1/4 inch (.64 cm) with a breaking strength of 4200 lb (1905 kg) and 1/8 inch (.32 cm) wire is coated to 3/16 inch (.48 cm) with a breaking strength of 2000 lb (907 kg).
Bolt Down Capability Yes
General Features Unique design allows user to begin by making only one adjustment to the movement arm start position. Contoured pad supports the back for proper spinal biomechanics during exercise.